/Engine/Plugins/FX/Niagara/Source/NiagaraEditor/Public/NiagaraNode.h
Request a pin type change to a specific type.
void RequestNewPinType ( [UEdGraphPin](API\Runtime\Engine\EdGraph\UEdGraphPin) * PinToChange, [FNiagaraTypeDefinition](API\Plugins\Niagara\FNiagaraTypeDefinition) NewType )